/* * Copyright (c) 2026, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ /* * @test * @bug 8387965 * @summary Tests a line number table attribute for pattern matching * @library /tools/lib /tools/javac/lib ../lib * @modules jdk.compiler/com.sun.tools.javac.api * jdk.compiler/com.sun.tools.javac.main * jdk.compiler/com.sun.tools.javac.util * java.base/jdk.internal.classfile.impl * @build toolbox.ToolBox InMemoryFileManager TestBase * @build LineNumberTestBase TestCase * @run main PatternMatching */ import java.lang.classfile.ClassModel; import java.lang.classfile.CodeElement; import java.lang.classfile.CodeModel; import java.lang.classfile.Instruction; import java.lang.classfile.MethodModel; import java.lang.classfile.instruction.LineNumber; import java.util.ArrayList; import java.util.List; import java.util.function.BiConsumer; import toolbox.ToolBox; public class PatternMatching extends LineNumberTestBase { static ToolBox tb = new ToolBox(); public static void main(String[] args) throws Exception { new PatternMatching().test(); } public void test() throws Exception { test(List.of(TEST_CASE)); } private static final TestCase[] TEST_CASE = new TestCase[] { new TestCase(""" public class PatternMatching { // 1 private void test(String s) { // 2 Object obj = "abc"; // 3 boolean isLong = obj instanceof String str // 4 && // 5 true; // 6 } // 7 } // 8 """, "PatternMatching", new TestCase.MethodData("test", List.of(3, 4, 7), true, new DetailedValidator( "line: 3", "LDC", "ASTORE_2", "line: 4", "ALOAD_2", "INSTANCEOF", "IFEQ", "ALOAD_2", "CHECKCAST", "ASTORE", "ICONST_1", "GOTO", "ICONST_0", "ISTORE_3", "line: 7", "RETURN"))), new TestCase(""" public class PatternMatching { // 1 private void test(String s) { // 2 Object obj = "abc"; // 3 boolean isLong = true // 4 && // 5 obj instanceof String str2; // 6 } // 7 } // 8 """, "PatternMatching", new TestCase.MethodData("test", List.of(3, 6, 7), true, new DetailedValidator( "line: 3", "LDC", "ASTORE_2", "line: 6", "ALOAD_2", "INSTANCEOF", "IFEQ", "ALOAD_2", "CHECKCAST", "ASTORE", "ICONST_1", "GOTO", "ICONST_0", "ISTORE_3", "line: 7", "RETURN" ))), new TestCase(""" public class PatternMatching { // 1 private void test(String s) { // 2 Object obj = "abc"; // 3 boolean isLong = obj instanceof String str1 // 4 && // 5 obj instanceof String str2; // 6 } // 7 } // 8 """, "PatternMatching", new TestCase.MethodData("test", List.of(3, 4, 6, 7), true, new DetailedValidator( "line: 3", "LDC", "ASTORE_2", "line: 4", "ALOAD_2", "INSTANCEOF", "IFEQ", "ALOAD_2", "CHECKCAST", "ASTORE", "line: 6", "ALOAD_2", "INSTANCEOF", "IFEQ", "ALOAD_2", "CHECKCAST", "ASTORE", "ICONST_1", "GOTO", "ICONST_0", "ISTORE_3", "line: 7", "RETURN" ))), new TestCase(""" public class PatternMatching { // 1 private void test(String s) { // 2 Object obj = "abc"; // 3 boolean isLong = obj instanceof String str // 4 && // 5 check(); // 6 } // 7 private boolean check() { return true; } // 8 } // 9 """, "PatternMatching", new TestCase.MethodData("test", List.of(3, 4, 6, 7), true, new DetailedValidator( "line: 3", "LDC", "ASTORE_2", "line: 4", "ALOAD_2", "INSTANCEOF", "IFEQ", "ALOAD_2", "CHECKCAST", "ASTORE", "ALOAD_0", "line: 6", "INVOKEVIRTUAL", "IFEQ", "ICONST_1", "GOTO", "ICONST_0", "ISTORE_3", "line: 7", "RETURN"))), new TestCase(""" public class PatternMatching { // 1 private void test(String s) { // 2 Object obj = "abc"; // 3 boolean isLong = check() // 4 && // 5 obj instanceof String str2; // 6 } // 7 private boolean check() { return true; } // 8 } // 9 """, "PatternMatching", new TestCase.MethodData("test", List.of(3, 4, 6, 7), true, new DetailedValidator( "line: 3", "LDC", "ASTORE_2", "line: 4", "ALOAD_0", "INVOKEVIRTUAL", "IFEQ", "line: 6", "ALOAD_2", "INSTANCEOF", "IFEQ", "ALOAD_2", "CHECKCAST", "ASTORE", "ICONST_1", "GOTO", "ICONST_0", "ISTORE_3", "line: 7", "RETURN" ))), new TestCase(""" public class PatternMatching { // 1 private void test(String s) { // 2 boolean isLong = obj() instanceof String str // 3 && // 4 true; // 5 } // 6 private Object obj() { return "abc"; } // 7 } // 8 """, "PatternMatching", new TestCase.MethodData("test", List.of(3, 6), true, new DetailedValidator( "line: 3", "ALOAD_0", "INVOKEVIRTUAL", "ASTORE", "ALOAD", "INSTANCEOF", "IFEQ", "ALOAD", "CHECKCAST", "ASTORE_3", "ICONST_1", "GOTO", "ICONST_0", "ISTORE_2", "line: 6", "RETURN"))), new TestCase(""" public class PatternMatching { // 1 private void test(String s) { // 2 boolean isLong = true // 3 && // 4 obj() instanceof String str; // 5 } // 6 private Object obj() { return "abc"; } // 7 } // 8 """, "PatternMatching", new TestCase.MethodData("test", List.of(5, 6), true, new DetailedValidator( "line: 5", "ALOAD_0", "INVOKEVIRTUAL", "ASTORE", "ALOAD", "INSTANCEOF", "IFEQ", "ALOAD", "CHECKCAST", "ASTORE_3", "ICONST_1", "GOTO", "ICONST_0", "ISTORE_2", "line: 6", "RETURN"))), new TestCase(""" public class PatternMatching { // 1 private void test(String s) { // 2 boolean isLong = obj() instanceof String str1 // 3 && // 4 obj() instanceof String str2; // 5 } // 6 private Object obj() { return "abc"; } // 7 } // 8 """, "PatternMatching", new TestCase.MethodData("test", List.of(3, 5, 6), true, new DetailedValidator( "line: 3", "ALOAD_0", "INVOKEVIRTUAL", "ASTORE", "ALOAD", "INSTANCEOF", "IFEQ", "ALOAD", "CHECKCAST", "ASTORE", "line: 5", "ALOAD_0", "INVOKEVIRTUAL", "ASTORE", "ALOAD", "INSTANCEOF", "IFEQ", "ALOAD", "CHECKCAST", "ASTORE_3", "ICONST_1", "GOTO", "ICONST_0", "ISTORE_2", "line: 6", "RETURN"))), }; private static final class DetailedValidator implements BiConsumer { private final List expectedMethodContent; public DetailedValidator(String... expectedMethodContent) { this.expectedMethodContent = List.of(expectedMethodContent); } @Override public void accept(ClassModel classFile, MethodModel m) { CodeModel code = (CodeModel) m.code().get(); List methodContent = new ArrayList<>(); for (CodeElement el : code) { switch (el) { case Instruction instr -> methodContent.add(instr.opcode().name()); case LineNumber ln -> methodContent.add("line: " + ln.line()); case CodeElement _ -> {} } } methodContent.forEach(System.err::println); tb.checkEqual(expectedMethodContent, methodContent); } } }